private void processSource(bool replaceSource)
{
int originalCount = _items.Count;
if (_sourceReadAndSubscribed)
{
int itemInfosCount = _itemInfos.Count;
for (int index = 0; index < itemInfosCount; index++)
{
ItemInfo itemInfo = _itemInfos[index];
if (itemInfo.Source != null)
{
itemInfo.Source.CollectionChanged -=
itemInfo.SourceNotifyCollectionChangedEventHandler;
if (itemInfo.SourceAsINotifyPropertyChanged != null)
{
itemInfo.SourceAsINotifyPropertyChanged.PropertyChanged -=
itemInfo.SourcePropertyChangedEventHandler;
}
}
if (itemInfo.SourceScalar != null)
{
itemInfo.SourceScalar.PropertyChanged -= itemInfo.SourceScalarPropertyChangedEventHandler;
}
}
Utils.initializeItemInfos(
Utils.getCapacity(_sourceScalar, _source),
out _itemInfos,
out _sourceRangePositions);
if (replaceSource)
{
Utils.unsubscribeSource(
_source,
ref _sourceAsINotifyPropertyChanged,
this,
handleSourceCollectionChanged);
}
_sourceReadAndSubscribed = false;
}
if (replaceSource)
{
Utils.replaceSource(ref _source, _sourceScalar, _downstreamConsumedComputings, _consumers, this,
out _sourcesAsList, true);
}
if (_source != null && _isActive)
{
if (replaceSource)
{
Utils.subscribeSource(
out _sourceAsIHasTickTackVersion,
_sourcesAsList,
ref _lastProcessedSourcesTickTackVersion,
ref _sourceAsINotifyPropertyChanged,
(ISourceIndexerPropertyTracker)this,
_source,
handleSourceCollectionChanged);
}
int plainIndex = 0;
int count = _sourcesAsList.Count;
object[] sourcesCopy = new object[count];
_sourcesAsList.CopyTo(sourcesCopy, 0);
for (int index = 0; index < count; index++)
{
object sourceItemObject = sourcesCopy[index];
IList sourceItem = sourceItemObject is IReadScalar <object> sourceItemScalar
? (IList)sourceItemScalar.Value : (IList)sourceItemObject;
int sourceItemCount = sourceItem?.Count ?? 0;
ItemInfo itemInfo = _sourceRangePositions.Add(sourceItemCount);
registerSourceItem(sourceItemObject, itemInfo);
IList <TSourceItem> sourceCopy = itemInfo.SourceCopy;
for (int sourceSourceIndex = 0; sourceSourceIndex < sourceItemCount; sourceSourceIndex++)
{
if (originalCount > plainIndex)
{
// ReSharper disable once PossibleNullReferenceException
_items[plainIndex++] = sourceCopy[sourceSourceIndex];
}
else
{
// ReSharper disable once PossibleNullReferenceException
_items.Insert(plainIndex++, sourceCopy[sourceSourceIndex]);
}
}
}
for (int index = originalCount - 1; index >= plainIndex; index--)
{
_items.RemoveAt(index);
}
_sourceReadAndSubscribed = true;
}
else
{
_items.Clear();
}
reset();
}
private Concatenating(int initialCapacity) : base(initialCapacity)
{
Utils.initializeItemInfos(initialCapacity, out _itemInfos, out _sourceRangePositions);
_thisAsSourceCollectionChangeProcessor = this;
}
protected override void initializeFromSource()
{
int originalCount = _items.Count;
if (_sourceInitialized)
{
int itemInfosCount = _itemInfos.Count;
for (int index = 0; index < itemInfosCount; index++)
{
ItemInfo itemInfo = _itemInfos[index];
if (itemInfo.Source != null)
{
itemInfo.Source.CollectionChanged -=
itemInfo.SourceNotifyCollectionChangedEventHandler;
if (itemInfo.SourceAsINotifyPropertyChanged != null)
itemInfo.SourceAsINotifyPropertyChanged.PropertyChanged -=
itemInfo.SourcePropertyChangedEventHandler;
}
if (itemInfo.SourceScalar != null)
itemInfo.SourceScalar.PropertyChanged -= itemInfo.SourceScalarPropertyChangedEventHandler;
}
Utils.initializeItemInfos(
Utils.getCapacity(_sourcesScalar, _sources),
out _itemInfos,
out _sourceRangePositions);
_sources.CollectionChanged -= handleSourcesCollectionChanged;
if (_sourcesAsINotifyPropertyChanged != null)
{
_sourcesAsINotifyPropertyChanged.PropertyChanged -=
((ISourceIndexerPropertyTracker) this).HandleSourcePropertyChanged;
_sourcesAsINotifyPropertyChanged = null;
}
_sourceInitialized = false;
}
Utils.changeSource(ref _sources, _sourcesScalar, _downstreamConsumedComputings, _consumers, this,
ref _sourcesAsList, true);
if (_sources != null && _isActive)
{
Utils.initializeFromHasChangeMarker(
out _sourcesAsIHasChangeMarker,
_sourcesAsList,
ref _lastProcessedSourcesChangeMarker,
ref _sourcesAsINotifyPropertyChanged,
(ISourceIndexerPropertyTracker)this);
int plainIndex = 0;
int count = _sourcesAsList.Count;
object[] sourcesCopy = new object[count];
_sourcesAsList.CopyTo(sourcesCopy, 0);
for (int index = 0; index < count; index++)
{
object sourceItemObject = sourcesCopy[index];
IReadScalar<object> sourceItemScalar = sourceItemObject as IReadScalar<object>;
IList sourceItem = sourceItemScalar != null ? (IList)sourceItemScalar.Value : (IList) sourceItemObject;
int sourceItemCount = sourceItem?.Count ?? 0;
ItemInfo itemInfo = _sourceRangePositions.Add(sourceItemCount);
registerSourceItem(sourceItemObject, itemInfo);
IList<TSourceItem> sourceCopy = itemInfo.SourceCopy;
for (int sourceSourceIndex = 0; sourceSourceIndex < sourceItemCount; sourceSourceIndex++)
{
if (originalCount > plainIndex)
// ReSharper disable once PossibleNullReferenceException
_items[plainIndex++] = sourceCopy[sourceSourceIndex];
else
// ReSharper disable once PossibleNullReferenceException
_items.Insert(plainIndex++, sourceCopy[sourceSourceIndex]);
}
}
for (int index = originalCount - 1; index >= plainIndex; index--)
{
_items.RemoveAt(index);
}
_sources.CollectionChanged += handleSourcesCollectionChanged;
_sourceInitialized = true;
}
else
{
_items.Clear();
}
reset();
}